Draft producer



0. W. ELLIOTT DRAFT PRODUCER Filed Dec. 29, 1923 OWEZZiott INVENTOR WITNESS; ATTORNEY Patented Feb. 24, 1925.

UNITED .sTATEs PATENT OFFICE.

OSKER W. ELLIOTT, O F CALERA, OKLAHOMA.

DRAFT PRODUCER.

Application filed December 29, 1923. Serial No. 683,448.

To a]? whom, it may concern:

Be it known that I, OSKER W. Enuo'r'r. a

citizen of the United States, residing at Caducing device which may be built into the chimney during the construction thereof or which may be manufactured as an attachmcnt thereto, the purpose of the device being to create a draft through the smoke stack or chimney for insuring a hot fire, the device being particularly useful in connection with heating plants which are defective in the draft feature and being of manifest advantage when startin a new fire.

An important 0 ject is the provision of a device of this character which is provided with a control damper by means of which the artificial draft may be controlled or cut oil entirely.

An additional object is the provision of a device of this character which will be simple and inexp nsive to manufacture, easy to install and operate, flicient and durable in service and a general improvement in the art. 1

\Vith the above and other objects and a vantages in view the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in hie-h:

Figure 1 is a sectional view through a smoke stack equipped with my device showing it of the built in type,

Figure 2 is an elevation and Figure 3 is a side ele ation showing the device constructed as an attachment.

Referring more particularly to the drawings the letter A represents a smoke stack of any ordinary or preferred type leading front afurnace or stove of a heating or power systern. In carrying out one form of my invention I provide a section 10 interposed in the smoke stack A and provided at one side with a blower fan casing ll formed centrally with an air inlet opening 12 and provided with a substantially tangentially arranged outlet conduit 13 which merges into the wall of the section 10 and which communicates with the interior of the section through an opening 14. Suitable braces 15 are provided for holding the blower casing stationary with respect to the smoke stack.

Extending transversely of the casing at opposite sides thereof are angle bars 16 which support bearings 17 for a shaft 18 carrying fan blades 19 of any ordinary or preferred type.' For effecting rotation ofthis shaft, it might be rovided with a crank, though I have 1llustrated it as equipped with a pulley 20 by means of which power may be applied for'operating the fan. Rotatably mounted transversely of the opening 14 is a damper plate 21 having a control arm 22 which is connected to a rod '23 or the like which may be moved for conconduit. 13, this blast producing a draft through the smoke stack which will assist the fire. By partly closing the damper plate, it is apparent that the blast and consequently the draft may be cut down and that by closing the damper plate entirely the draft will be cut off even though the fan should still be in operation.

In Figure 3 I have illustrated a slight modification in which I construct the device as an attachment to a smoke stack. In this form the fan casing 24 is formed integral with a conduit member 25 provided with side flanges 26 adapted to be secured at opposite sides of an opening in the smoke stack A by. means of suitable bolts 27. At the upper and lower ends of the smoke stack engaging portion of this conduit member are split or sectional bands 28 which embrace the stack and which are clamped thereon by means of bolts 29. I also provide a sectional band 30 mounted below the others and clamped upon the stack by bolts 31. Connected with this band 30 is a brace 32 secured to the fan casing 24. In other respects this form is identical in construction with the first described form and operates in exactly the same manner.

From the foregoing description and a study of the drawings it will be apparent that I have thus provided a simply constructed, inexpensive and easily rinstalled and operated device by means of which a suitable draft may be quickly and easily produced. As the parts are so few it is apparent that there is "ery little to get out of order so that the device should have a long and satisfactory life.

While I have shown and described the preferred embodiment of my invention it is of course to. be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not departfrom the spirit of the invention or the scope of the subjoined claim.

Having thus described my invention I claim:

In combination with a smoke stack, a

draft producing mechanism comprising a casing of cylindrical form located exteriorly of the smoke stack and having an upwardly and laterally inclined extension connected with the stack and communicating therewith, a movably mounted damper within said extension, a pair of bars located at opposite sides of the casing and arranged at right angles to the longitudinal axis of the stack, bearing on said bars, a shaft journaled through said bearings and carrying a rotary lower wheel or fan within the casing, the fan being located in a plane coincident with the longitudinal axis of the stack.

In testimony whereof I aflix mysignature.

()SK ER W. ELLIOTT. 

